From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Fuel consumption tests, carburetter development, and sparking plug issues for the 'Condor' engine.
| Identifier | ExFiles\Box 79\1\ scan0135 | |
| Date | 13th September 1918 | |
| R.R. 235A (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. To R.{Sir Henry Royce} from EH c. to CJ. c. to E.{Mr Elliott - Chief Engineer} c. to BY.{R.W. Bailey - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} X.601 EH2/LG13.9.18. 13th Sept. 1918. RE "CONDOR" ENGINE X.3254. X.601. X.1831. We have not carried out many tests with the consumption of the "Condor" because we have not yet got the proper carburetters and inductions pipes. On the tests we have carried out so far, the best we have obtained is .5 lbs. per HP. hour. We have just received the first castings for the float chamber for the new carburetter so that in a short while we ought to have the engine fitted up complete with its own carburetters and latest induction pipes. We have no doubt in our own minds that we shall be able to get the consumption of .45 or .46 lbs per HP. hour. Since our recent tests on high compression shows that the temperatures of the valves and the pistons are less with high compression, we are keen on running with as high compression as possible. The only thing that limits us are sparking plugs. Lately we have carried out a number of tests on sparking plugs in conjunction with Lodge Sparking Plug Co., We have got some plugs which are very good for absence of pre-ignition and very good for withstanding oil. The trouble we have had with them is that they have not a very long life. One part which has failed has been the nickel point which is Contd. | ||